Lubricating system and sewing-machine construction



J. P. was.

LUBR|CAT|NG,SYSTEM AND SEWING MACHINE CONSTRUCTION.

APPLICATION FILED APR. 29. 1916. RENEWED use. 24. 1919.

1 3,527 "Patented Aug. 3,1920

5 SHEETS-SHEET I- r I I A TIDE/Vi y J. P. WEIS.

LUBRICATING SYSTEM AND SEWiNG MACHINE CONSTRUCTION.

APPLICATION FILED\APR. 29, 1916. RENEWED 02c. 24. I919.

Patented Aug. 3, 1920.

5 SHEETSSHEET 2.

J. P. WEIS.

LUBRICATING SYSTEM AND SEWING MACHINE CONSTRUCTION. APPLICATION FILED APR.29, I916. RENEWED DEC. 24. 1919.

Patented Aug. 3, 1920,

5 SHEETS-SHEET 3.

.l. P. WEIS. LUBRICATING SYSTEM AND SEWING MACHINE CONSTRUCTION.

APPLIC ATION FILED APR. 29, I916- RENEWED DEC. 24. I9I9- Patented Aug. 3,1920.

5 SHEETS-SHEET 4 II I IT IAI I Am IWTNESSfS. I

J. P. WEIS. LUBRICATING SYSTEM AND SEWlNG MACHINE CONSTRUCTION.

7 APPLICATION FILED APR. 29, I916- RENEWED DEC. 24. 1919. 1 8,527.

Patented Aug. 3, 1920.

A 5 SHEyETS-SHEET 5- 147' I O ENE Y [WNW/$555.53

JOHN PETER WEIS, OF NYACK, NEW YOIRJK, ASSIGNOR OF ONE-HALF TO METROPOLI- TAN SEWING MACHINE CORPORATION, OF NEW YORK, A CORPORATION OF DELAWARE.

LUBRICATING- SYSTEM AND SEWTNG-MACHIN'E CONSTRUCTION:

Specification of Letters Patent.

"Patented Aug. 3, 1920.

Original application fil ed October 16,191e, Serial No. 867,005; Divided and this application flled April as, 1916, Serial No. 94,354.. Renewed December 24, 1919. Serial No. 347,190.

To all whom it may concern Be it known that I, J OHN PETER NEIS, a citizen of the United States; residing at Nyack, in the county of 'Rockland and State of New York, have invented certain new and useful Improvements in Lubricating Systems and Sewing-Machine Constructions, of which the following is a specification.

. This invention is an improvement in sewing machines with or without stop-motions,

. and involves constructional arrangements whereby thorough and constant lubrication is obtained for sewing machine and stopmotion parts, eitheror both. Thesewing machine and stop motion illustrated are high-speed mechanisms in which serious heating would occur were the necessary parts not thoroughly and constantly lubricated while the mechanisms are in action. My invention is generally applicable to sewing machines embodying features of my present invention independently of any embodiment of those featuresof the invention United States which relate to the stop-motion for the drive-shaft of the sewing machine.

This application is a division of'my ap plication berial No. 867 ,005- for sewing machine and cutting mechanism therefor, filed October 16, 1914, and which describes features of improvement onthe combined cutting-and-sewin machine shown in my atent No. 1,11,082, of Octo ber 20, .1914.

In the accompanying drawings forming construction of the rearward oil-receiving part hereof Fig. 2 is a lengthwise sectional viewfofmachine heads at line i partly in vertical, central section, at a line Figure 1 1s a top lan view of a portion of. the combined cuttmg-and-sewing machine mentioned. This view shows two sewing machine heads and for each head one member of a stop-motionQ The view is particularly useful in locating parts illustrated in other figures.

one of the sewin 2-2 of Fig. 1. This view shows an oil reservoir and pump carried by one of the sewing machine heads, the construction and are rangement of the top drive-shaft andof the looper shaft'and of variousconnections'between the two, together with the means for driving the oil pump and a portion ofthe stop motion, in lengthwise central section,

the 1 p ri haft of asiiwing machine.

ceivin Fig. 3 is a sectional elevation at line 33 of Fig. 7 and illustrates the oil reservoir and oil pump with a portion of the pum driving belt which also drives the top sha of a sewing machine.

Fig. 4 is a perspective view of pump gears.

a pair of Fig. 5 is a face view of the pump-casing voir. The belt shown is for driving the top shaft of the sewing machine and also for driving thev oil pump.

Fig. 8'is a View partly in side elevation and partly in vertical section at line 88 of Fig. 1, and shows the top drive shaft of therefor and a stop motion control lever provided with meansfor holding a shockabsorbing body of oil.

Fig. 9 is a rear end tion control lever and of its pivoted stop fin er. ig. 10 is-a side elevation of the rearward end portion of the stop-motion control lever and of the other parts shown in Fig. 9.

Fig. 11' is .an elevational view partly in full lines and partly in lengthwise central view of the stop-moa sewing machine head with a stop motion section, of a thimble-forming part of the and oil-holding end of the stop motion control lever.

' -Figs. 12 and 1 3 are respectively. side and end elevations of a perforated sleeve for rethe thimble shown in Fig. 11, the sleeve cing adapted for a threaded connection with a chamber in the rearward; end of the aforesaid lever. i

Fig. 14: is a view partially in elevation and corresponding to line 14-1a of Fig. 15, and shows a rearward portion of the top shaft of a sewing machine head provided with a pulle for driving such shaft and for clutc ing the" stop motion thereof. The view also shows certain details of the stop motion, including a recess for a brake shoe omitted from the view,

Fig. 15 is a view partially in elevation and partly in transverse section at line 1515 of Fig. 14, and shows the driving and clutch pulley together with details of the stop motion. This view shows the stopmotion balls in a clutched. position by engagement with a ball-retaining ring clamped in thebelt wheel.

Fig. 16 is a View similar to Fig. 15 but shows stop-motion wedges and balls in nontainer, and another portion of which forms a stop tooth. This sleeve is a member of the stop, motion and has portions acted on by a brake shoe.

. lines.

Fig. 20 is a transverse sectional view of" said sleeve at line 20-20 ofFig. 19.

Fig. 2 1 is an end elevation of the rearward end of the top drive-shaft and of the driving and clutch pulle in assemblage with the parts shown in Figs. 18, 19, 20, and other figures.

Fig.22 is a perspective view of one of the ball-receiving wedges forming part of the stop motion.

Fig. 23 shows in two views a brake shoe forming a part of the stop motion.

Fig. 24 isa view partly in elevation and partly in transverse central section at line 24-24: of Fig. 14, and illustrates the construction of the rear-end bearing for the stop sleeve shown in Fig. 14 for the rearward end portion ofthe top-shaft. Thebrake shoe is indicated in plan by dotted Fig. 25 shows in elevation and end view a brake-shoe pressure-plug forming part of the stop-motion.

Fig. 26 is aperspective view of the brakeshoe lifting lever forming apart of the ,stop

, .motion.

Fig. 27 is an enlarged view of the needl holder guide, to show more clearly the oil conduits in these parts.

Referring to the drawings, the two sewing machine heads together with their respective stop-motions are identical. Description of one sewing machine and of one stopmotion will therefore be sufiicient. The sewing machine head comprises an upper horn A, an under'horn A, and a connecting trunk a, the horns and trunk having communicating chambers. The outer wall of the trunk comprises an inwardly projecting boss a in the inward end of which stopmotion members are arranged in operative relation to the rear end of the top or needlebar drive-shaft. The upper side of the upper horn A is provided with a covered opening at a for access to the chamber of the trunk, and the outer end wall is provided with an opening a through which the lubricant is poured into an oil container carried by a lower part of the trunk. The rear wall of the trunk is also provided with a covered opening a into a lengthwise-extending chamber ofthe boss a for observation of I I the lubricant through the transparent cover.

a in the chamber of the boss a, the rearward portion of such chamber formlng an oil space and the forward portion forming.

a housing.- The top drive-shaft and the p looper shaft hereinafter described are both tubular and each is inclosed between its ends for the greater paraof its length in tubes hereinafter described, which-are centered and held in the lengthwise-attending chambers of the horns by set-screws a through the horns and impinging on the outer. surfaces of the tubes. Lubricating system anal sewing maaM ne head conszfmctz'on.The oil reservoir 1 carried by the lower part of the trunk is supplied with oil through the opening a, the oil being poured into the drip. an 2 which cov- I ers the top of the oil reser oir and also PI0- jects laterally thereof in he direction of and below the under horn A. The trunk is open at a on its under side. The drip-pan is provided over the rearward side of the space containing filtering material 6. The' walls 5 are numerously perforated at 7 and the oil flows from compartment 4 through the perforations in the walls 5 and the filtering material between them into the compartment 8 wherein an oil pump is located.

The drip-pan has a vertically walled opening 9 through it for passage of a belt B that ,drives the pump. The induction tube 10 of the pump extends downwardly towardthe bottom of compartment 8 and the eduction tube 11 extends upwardly from the pump through the chamber of the trunk to conduct the pumped oil to the oil conduit 12 in the top ofthe boss at. The pump 'comprises two small .thin spur gears 13 and 13,

I one of the gears being provided with trunnions 14 which are journaled in the side walls of the pump casing, and the other gear being-fixed on a shaft'15 which is jour- ,naled in the side walls of said casing and has one of its ends extended to receive the driving pulley 16. The pump casing comprises a recessed block and a cover theremr. The block has an elongated recess 17 of a depth of the thickness of the gears which 33 for the, needle-driving crank 34 fixed on the projecting end of the'shaft 25. At its rear end, shaft 25 is fixedly united to a tubular ball crank member 25 which forms a 5 are the same thickness. The recess '17 has rearward prolongation of the top drive- 70' a length. sufficient to receive, the two gears shaft. The member 25 is formed with two when intermeshed. The block is provided ball cranks 35 which are each drilled at 36 with alined holes which lead from opposite to form oil conduits from the lengthwise sides of'the recess 17. One hole is under tubular chamber of the member 25 to the and the other above the gears, for recepbearings 38, one at the upper end of a con- 75 tion respectively of the pump induction and necting rod 39 and the other at the upper eduction tubes 10 and 11 which are alined endofa connecting rod 39; The tubular ball with the intermeshing peripheries of the crank member 25 has its bore in alinement two gears. The outward face of the block with the conduit 26 of the shaft 25 so that r 15 has an annular recess the bottom 18 of which the conduit 26 extends from its front plug 530 is Hush with the outward surfaces of the in- 28 rearwardly to the extreme outer end of termeshing gears. The outward face of the such ball crank extension of the top driveblock has another annular recess 19 concenshaft. The rear end of the bore in said extric with, but of greater diameter than recess tension opens into oil chamber 27. Surplus 2o 18. The recess 19 is inclosed vvby the maroil from the ball cranks 35 and the bearings 85 gins of the outward face-of the block 38 flows down the connecting rods-39 and which is indicated by 21. The cover is 39 to the respective ball bearings 40 and 41 formed of a disk having on its inner face an thereof at their lower ends." "The wall of annular projecting boss 22 of a diameter to the conduit 26 within the inclosing end of fit into a recess the bottom of which is indiits rearward extension 25 is bored at 42 and M rated by 18 with the inwardface of'the the in'closing forward end'oft he member boss close up to the outward faces of the in '25 is coincidently bored at 43 to formcontermeshing gears. The cover is also produits from the conduit 26 to the rearward vided with an annular flange 23 which fits bearing '44 of the top drive-shaft 25, this into the recess 19 andis fixed air-tightly" rearward bearing being fixed in-the rear end 95 thereinto. Boss 22 is provided on its inner of the inclosin-g tube 32. The side wall of .face with bearing holes 24 which extend the front end of conduit 26 just rearwardly only partway through the boss 22 and which of the plug 28 is perforated at 45 exteriorly support, one an end of the gear shaft 15, and of the front bearing 31 and} within the housthe other a trunnion of the gear 13 These ing 33 to form an oil conduit leading from 106 bearing holes 24 are blind holes for insurance conduit 26 into an oil conduit 47 formed by of air-tightness ofthe pump. The pump drilling the needle-driving crank 34. gears 13 and 13mm shown full size, and so Conduit 47 discharges oil on the front adalso is the entire pump structure in Figs. vancing surface of the crank at one side of 5 and 6. It has been found inpractice that" the crank pin 48 and such oil flows down the a pint of oil can be passed through the sewadvancing surface of the rotating crank to ing machine every three minutes by means and lubricates'the crank pin in its bearing of this pump which is practically efficient in 49 which is formed in the upper end of the keeping some oil-containing parts constantly needle-driving link 50. Some of thls oil is lubricated by oil spray produced by either flows out on the crank, and going to the the centrifugal or vibrating forces of the crank-pin bearing, is whirled off by cenhi h-speed. parts. trifugal force and caught within the housing The top drive-shaft 25 is bored through 33; and other of the oil coming to the crank out its length to .foriman oil conduit 26, the pin bearing flows down the needle llllk 50 50 rearward end of this shaft projecting into to and lubricates the connectlon 51 of the the oil chamber 27 in the boss a, such chamneedle link with the needle holder 53. Tips her being supplied from the eduction tube -oil escaping atthe connection 51 finds ltS' 11 throu h the conduit, or port 12 in the -way to the needle-holder guide-bar 54 and upper si e of the boss a. The front end-of needle-holder cars 55 that reciprocate verti- 55 the conduit 26 is plugged at 28. Theffront cally in the groove 56 of the needle-holder end o fthe top shaft has an exteriorly re- 'guide' 57. The oil pasmg through the conduced'portion 29 andin thisportion its wall duit 47 is forced thereinto' by centrifugal isdrill'ed at 30 to form oilconduits leading force and it is found'in practice that the from the conduit 26 and permittingthe pas-- amount of oil finally comlng to the needle to sage of oil therefrom to the front bearing 31 holder and, needle-holder guide 1s, whlle 12$ of this top shaft; the bearing 31 being fixed suflicient for lubricatlon purposes, negllglble in an inclosing tube 32 which is held in place so far as any deposit of 011 on the goods is --ligytheset-screws 09.. The inclosing tube 32 concerned. I Q

' projects forwardly beyond the frontwall of The shank ofthe needle-holder guide 57 15 '6 t from hearing 31 and formsa housing formed" with an oil conduit '58. ig 2 drop to the bottom thereof. The front bearing 31 is formed on its under side with a lengthwise conduit 61 that conducts oil rearwardly into the tube 32 from the bottom of the housing 33; and such oil flows rearwardly through the conduit 61 along the bottom of the tube 32 to oil-conduit 62 which is formed in the bottom of the rearward bearing 44 of the top shaft.

The rear end of conduit 62 discharges within a housing or cap 63 which is open at its under side. This cap incloses the rearward end of the tube 32 and has at its rear end an opening for reception of the flanged end of the pulley hereinafter described. The under sides of the housing or cap 63 are curved laterally inward at 64 giving the housing 63 a trough shape along its bottom both lengthwise and transversely thereof. Oil flowing into the chamber of the housing from conduit 62 flows along the adjacent edges 65 thereof to the drip point 66 which is directly over. a V- shaped oil-receiving space 67 in the upper side. of a bell crank 68 one arm of which terminates in a ball 41. working in the ball bearing 41, and the other arm of which terminates in a ball 69 which is entrant in the looper shaft. Oil so falling into the space or opening 67 oils the crank of the bell crank journal and flows down the lower bell-crank arm to its end 69 which is within the rear end of the lengthwise-chambered looper-shaft 70, the upper side of 'this' looper shaft having a slot 70 through which the lower end of the lower arm of the bell crank extends. Oil collecting in the chamber of the looper shaft at the lower "end of the lower arm of the'bell crank, flows forwardly through conduits 71 in the plug 72 which is slidable in the chamber of the I looper shaft just forwardly ofthe lower ball end 69 of the lower member of the bell crank. The oil flowing through these conduits 71 passes the coil spring 73 which.

is mounted between the slidable plug 72 and a forward fixed plug 74 that forms an abutment within the chamber of the looper shaft for the forward end of the coil spring 73. The plug 74 is formed with conduits 7 5 whereby the oilfiows therethrough and forwardly through the chamber of the looper shaft to the front end portion thereof, and thence through openings 76 in its a.

side wall for oiling its front bearing 77 thence some of the oil escapes into the annular recess 78 on the front face of the bearin 77, from the lower portion of which recess 7 8 a conduit 79 extends downwardly andrearwardly into the chamber of a tube 80 which incloses a greater part of the length of the looper shaft, and in the front end of whichthe front bearing 77 of the looper shaft is fixed. The rear bearing 77 of the looper shaft is fixed in the rear end of the tube 80 which is centered in the chamber of the lower horn A by set screws a. similarly to the centering and fixing of the inclosing tube 32 for the top drive-shaft.

The rear bearing 77 is provided with a rearwardly inclined conduit 81 which discharges into the forwardly projecting portion of the drip-pan, the bottom of which is inclined rearwardly to' the oil strainer 3. The looper shaft has its rearward portion within the rearward bearing 77 provided with oil conduits 76 for lubricating the looper shaft in its rearward bearing.

Theconnecting shaft 39 leading to the hall crank 40 at the rear end of the looper shaft, serves to oscillate the vlooper shaft, the ball crank 4O projecting from a plug 82 fixed in the rear end of the looper shaft. ,The connecting rod 39 at its lower end cooperates with the ball 41. on the outer end of the upper armof the bell crank 68 and reciprocation of this connecting rod 39*, by-means of the bell crank, the movable lug 72', the spring 73, and the fixed plug 4, secures endwise reciprocation to the looper shaft in its front. and rear bearings 77 and 77*, the forward movement of the.

looper shaft being against the resistance of the spring 73 which is a mere take-up spring for wear on the plugs 72 and 82 and the ball 69. Spring 73 is under heavy tension and the reciprocation of the looper shaft is positive in each direction. The ball con shaft with the looper shaft each with a tube in the ends of which the bearings for each shaft are fixed, and the centering of these tubes respectively in the lengthwise-extending chambers of the upper and under arms ofthe sewing machine head, are novel features of importance in respect to economy of construction and assemblage. The lubrieating system is of very great importance and permits adequate lubrication while the machine is operating at very high speed, efficiently lubricating the mechanisms above described and also the stop motion for the sewing-machine drive-shaft. This step motion forms the subject matter of a divisional application, Serial No. 94,355, filed April 29, 1916, of my said application Serial No.-

these cranks it has an enlarged portion 91 formed circumferentially with three wedgereceiving pockets 92 at 120 apart, to receive the segmental wedges 93, the curved wall 'of each of which from its butt to its pointed end, is grooved at 94 in the direction of the curvature of the wedge to receive balls. The cross-section of the pockets is shown in Figs. and 16, which also show the cross-- section of the wedge shown in perspective in Fig. 22. The curved grooves 94-- are eccentric to the axis of the top shaft, and the outward edges of the side walls 95 of each groove are concentric with the top shaft axis and flushwith the periphery of the enlargement 91. A stop sleeve 96 (Figs.19, 14 and 15) has two interior and two corresponding exterior diameters. Portion 97 of the sleeve fits freely on the top-shaft enlargement 91 and holds the wedges 93 in the pockets 92. Portion 97 of sleeve 96 is provided with three openings 98 through its annular wall, spaced apart 120 to receive the balls 99,

each of which lies projectingly in an opening 98, and also lies in a groove 94 of a wedge 93. A ball retaining ring 99 forms part of the belt-wheel 100 which is made in two parts secured laterally together by screws -'101, the ball retaining ring being secured fixedly between them. The belt-wheel has a hub 102 projecting from each of its sides, the hub fitting loosely and running on the sleeve 96 which is exteriorly reduced in di ameter at 103, 103, and exteriorly provided with an interposed stop tooth 104 between the reduced portions 103, 103 which are of uniform exterior diameter. The tooth 104 is formed by grooving the outer wall of the sleeve annularly and eccentrically to its fend of the spri lengthwise axis between the portions 103. This eccentric groove is indicated by 105. The interior annular wall of the reduced portion of sleeve 96 has a lengthwise-extending key-slot 106 to receive a radially projecting key '107formed on the outer end 108 of the top shaft extension 25 adjacent the enlargement 91 (Figs. 17, 18 and 20). The

interior wall of the reduced portion ofthe sleeve 96 is indicated'by 109. v The sleeve 96 is provided at the end of its reduced portion with a pin 110 extending in the direction of the length of the sleeve. spring 111 which is the stop-motion starting spring, is secured to this pin, and the other 'ng is connected by a pin 112 ing 113 for the assembled sleeve a cut-out 115 formed in the bearing 113.

tically slotted at of the stop-motion control lever One end of a coil to the keyed portion 107 of the top shaft. An end bearing 113 for the sleeve 96 is cut out at 114 to receive a brake shoe, and also at 115, and is formed with a bore 116 (Fig.

24) wherein portions of the reduced portions 103 with other portions of the sleeve freely rotate in exposure to the brake shoe. A brake-shoe 117 (Figs. 8, 23 and2) is mounted in the cut-out 114. The shoe has a lining 118 of babbitt or other metal or material,

and on its upper or back side has a slot 119 brakeshoe is concaved at 124 at right-angles to the slot 119 toreceive the convex head 125 of the pressure-plug 126, the head being slotted at 127 to receive the end 120 of the lever 121. A coil spring 128 (Fig. 8) surrounds the upwardly-extending stem of the pressure-plug 126 and a hollow screw 129 surrounding the stem' of the pressure plug is mounted in the housing mentioned to regulate the pressure of the spring the under end of which bears on the flange 123 of the pressure plug head, The housing is centrally chambered at .130 to receive the bear- 96 and shaft end 108 (Figs. 2, 8 and 14). The housing on its side opposite the pressure plug or on its under side in the form shown, has a radial slot 131 which communicates with ltiie 1e housing, adjacent the pressure plug, is slotted at 132 to receive the pressure-plug-lifting lever 121 which at 122 is pivoted be tween side walls of the slot. The oil chamber 27 is at the outward end of the chambered boss or housing a and is supplied with lubricant from the oil tube 11, the upper end of which overhangs and discharges into the oil-feed opening 12 formed vertically in the upper wall of the housing.

lS top-rmotz'on control-The chine trunk is provided with a bulging projection 134 at its upper front side. Thefront wall of the-bulging projection is ver- 135 to receive the hub 136 137 which is formed forwardly of its hub with a transverse opening 138 into which projects the end of an adjusting screw 139 to engage the end 1.40 of a trip lever 141, the end 140 projecting laterally into the hole 138 in opposition to the end of the adjusting screw 139. The stop-motion control lever 137 is fixed on a transverse rocker shaft 142 by set screw 143. The ends of the rocker shaft 142 are journaled in bearings in the side walls of the slot 135 of projection 134, and the trip lever 141 which is loosely fulcrumed on the rocker shaft 142 is provided with an upsewing-maof the trunk and its upper side is recessed at 145 to hold a wire basket or the like 146 filled with filtering material 147, the basket or container being held in place by a staple 148. The recess 145 and filtering material hold lubricant supplied by the oil pump referred to, the lubricantfalling into recess 145 from the conduit 90. An oil canal 149 extends forwardly from the bottom of the lubricant recess 145 through the end wall of a bore 150 in the rear end of the controllinglever arm 144. The outer' portion of this bore is tapped to receive a hollow annular bushing 151 having in its forward end a plug 152 secured to the bushing by a transverse pin 153. The plug has an integral rearwardly-extendingstem 154. The outer or rearwardly-extending end of the bushing is threaded so as to be screwed into the tapped end of the bore 150, and forwardly of its threaded portion the bushing has a reduced exterior diameter through the side walls of which, just inwardly of the inner wall of the plug 152, oil holes 155 are formed. The annular wall of the bushing also has a series of annularly arranged oil holes 156 adjacent the inward end of its A sliding thimble 157,

threaded portion. the rearward closed end of which is rounded off at 158, is mounted in the bore of the bushing 151, the, tubular wall 159 of the thimble sliding freely in the bushing, and the thimble serving as a valve to cover and to uncover the series of oil holes 156, but not to cover oruncover the oil holes 155 which are diametrically alined one with the other. "A coil spring 160 surrounds the plug stem 154, abuts against the rearward wall of the plug, and also abuts at its other end against the end wall of the thimble, and this spring has a strength just sufficient to push the sliding thimble outwardly to uncover the oil holes 156 when exterior pressure on the thimble end is relieved. The outwardlyrounded head 158 of the thimble is always pressed outwardly by the spring 160 against the opposed end 161 of a stop finger 162 which by pin 163 is pivoted to'a bracket 168 carried by the rear end of the arm 144 of the stop lever 137. The lower end of the stop finger is provided with a transverse pm 164 projecting on both sides, and each projecting end of the pin has connected to it a coil spring 165. The upper end of each spring is attached to the projecting neck ends 166 of the pin 163. The springs thus mounted are under tension and hold the stop finger 162 with the pivot pin 163 abutting against the under wall of a slot 167 formed through and elongated in the direc- 1 tion of the length of'the stop finger, by the spring 165 and slot 167 construction. The

stop finger 162 permits the stop lever 137- and its arm 144 to assume the position shown in Fig. 8, even if the tooth 104 is not in exact position for reception of the stop finger162 so that it will enter the eccentric cut 105 to engage the tooth 104 on its next rotation The bracket 168 carried by the stop lever arm 144 is slotted at 169 to receive the stop finger, the head 170 of which coacts with the stop tooth 104. The upper side of the bracket 168 projects upwardly into a slot 171 of the housing or boss (1, I

surfaces of the stop motion through the space (Fig. 2) between the outer surface of the outer end of the top shaft extension 25 and the inner surface of the sleeve 96. This s ace as an oil-receiving conduit is seen in Iigs. 2 and 21 where it is indicated by 172. Thence the oil finds its way between opposing surfaces of parts and works in between the outer surface of the enlarged portion 91 of the top shaft extension 25- and the inner surface of the enlarged portion 97 of sleeve 96, reaching the balls 99 and the wedges 94 and the walls of the wedge-receiving pockets 92.

The mode of operation of the stop motion is as follows: As shown in Fig. 8 the stop finger 162 is up against the stud 163 with its upper end in engagement with the stop tooth 104. The brake shoe 117 is in its lowermost position. The top shaft is rotatable in counter-clockwise direction as indicated by the arrow in Fig. 8, and the shaft is in its stopped position. Assuming that the stop-motion control lever 137 has its outward or forward end lifted, then the engagement with the tooth 10.4. taneously the arm 143 of the trip lever 141 Wlll be depressed, pushing the forward end the clutch sleeve 96 is relieved. The spring stop finger 162 will be pulled downout of Simul 111 (Figs. 14 and 21) instantly causes the stop sleeve 96 to rock, thereby forcing the balls 99 which project through the holes 98 in the stop sleeve to climb up from low to high position in the grooves 94 of the wedges 93. Thereupon, when the balls get into this high position they wedge between thewedges and the ball-retaining ring 99, and as this ring is clamped in the pulley 100, rotation of the pulley rotates the ballengaging ring and thereby the rotational movement is imparted to the-balls and the Wedges and as the latter are in the ball-receiving pockets of the top shaft, rotation of the top shaft is effected. On the other hand, whenever in the rotation of the top ment of the stop-motion control lever which is required to thrust vthe upper end of the stop finger into the eccentric groove 105, raises the arm 143 of the stoplever 141 out of pressure contact with the pressure plug lifting lever 121 and then the spring 128.

expands and forces the brake shoe against the stop sleeve 96. The brake shoe presses against'the reduced diametric portions 103 of the stop sleeve. are so timed that each opposite movement of the brake shoe and pressure plug and co nsequently of the pressure plug lifting lever 121, slightly precedes the initial opposite movements of the stop finger in its engagement and disengagement with the tooth 104'. The purpose of this timing is that the brake shoe in its braking movement against the stop sleeve 106 shall overcome the tension of 'the spring 111 and the fact in this connection is that when the tension of the spring-111 is relieved or as it is relieved gradually, the balls are shifted correspondingly out of interlocking relation to the ballretaining sleeve and it is noticeable vthat the power transmitted through the balls to the shaft is under the control of the spring 111. The result of this is in practice that there is a minimum of shock.

I have'above-referred to the relation of the cap 63 to the pulley or belt wheel hub 102. The belt wheel as shown has the ends of its projecting hub annularly grooved at 102 at each end. The outward end of the the other side of the pulley, the purpose of thecorresponding flange 102 is to prevent any oil getting into 'that' groove from fly- 1 located in the trunk; an oil reservolr in the trunk; an oil pump; an oil eduction coning onto the belt.

The stop motion in the form shown is The parts in questionoperable instantly to arrest the top drive shaft at the completion of any revolution, and in'the sewing machine stops the drive shaft with the needle up above the'work. What I claim is:

1. The combination of a sewing-machine head having lengthwise chambered upper and under arms with a tube fixed in the upper arm chamber; top-shaft bearings for Y supporting a top shaft in said tube; a tubular top shaft; a tube fixed in the under arm chamber; bearings for supporting a looper shaft in the latter tube; a tubular.

looper shaft; means operatively connecting the top andlooper shafts to secure simultaneous movement of such'shafts; a stop motion for the top shaft; a drive pulley; and means for giving endwise movement to the looper shaft; and means for conveying oil to the tubular shafts.

2. The combination ofa sewing-machine looper shaft; means operatively connecting the top and looper shafts to secure simultaneous movement of such shafts; a stop motion for the top shaft; a drive pulley; and means for giving endwise movement to the looper shaft; an oil reservoir; an oil pump; an oil container and conduit communicating with the stop motion; the pump discharging into said conduit; a stop motion control mechanism constructed to receive oil from said container; the chamber of the top shaft communicating with said container and the top shaft being ported for escape of oil therefrom to stitch-forming mechanisms to be lubricated; means for conducting oil from the top shaft into the looper shaft tube; means for conducting oil from the looper shaft tube to theoil reservoir; and means for conducting oil from the top shaft into its tube and for conducting oil therefrom to the means connecting the top and looper shafts.

3. The combination of a sewing-machine comprising a hollow upper arm, a hollow under arm, and a-trunk connecting the two arms with a top-shaft tube and supports therefor in the upper arm; a tubular topshaft and bearings therefor in the top-shaft tube; an under tube and supports therefor in the under arm; anunder tubular shaft and bearings therefor in the under shaft tube; stitch-forming devices carried by the upper shaft and cooperating stitch-forming devices carried by the under shaft; operative connections between the two shafts and the under shaft; ports therein for escape of oil to its bearings; a return conduit in the front bearing of the upper shaft; a return conduit in the rear bearing of the under shaft; the latter discharging into a drippan for the oil reservoir; the drip-pan;

and an oil filter.

4. 'The combination of a sewing machine comprising a hollow upper arm, a hollow under arm, and a trunk connecting the two arms with a top-shaft tube and supports therefor in the upper arm; a' tubular topshaft and bearings therefor in the top-shaft tube; an under tube and supports therefor in the under arm; an under tubular shaft and bearings therefor in the under shaft tube; stitch-forming devices carried by the upper shaft and cooperating stitch-forming devices carried by the under shaft; operative connections between the two shafts and,

located in the trunk; an oil reservoir in the trunk; an oil pump; an oil eduction conduit leadingfrom the pump and communicating with the tubular top shaft; oil ports therein for escape of oil to said operative connections; an oil port therein for escape of oil to the needle-actuating devices carried by the tubular top shaft; a dam in thefront end of the tubular top shaft; conduits in the top-shaft bearings therein; means for leading oil from the upper portions of the operative connections to the lower portions thereof and from the latter into the rear end of the under shaft; ports therein for escape of oil to its bearings; a return conduit in the front bearing of the upper shaft; a return conduit in the rear bearing of the under shaft; the latter discharging into a drip-pan for the oil reservoir; the drippan; and an oil filter.

5. A sewing-machine head comprising lengthwise-chambered upper and under arms connected by a chambered trunk, the chamber whereof connects with the chambers in the arms, the head being provided in its trunk portion with a chambered oilreceiving boss; an oil reservoir; an oil pump arranged to discharge oil from the reservoir into the chamber of the boss; a tube fixed in the chamber of the upper arm; hearings in said tube for the driveshaft; said drive shaft mounted in said bearings and being lengthwise chambered; a tube fixed in the chamber of the lower arm; hearings in said lower tube for a looper shaft; said looper shaft formed with a lengthwise-extending chamber; I stitch-forming; mechanisms; meansconnecting the upper shaft with the looper shaft .to secure endwise reciprocation thereof; means connecting the upper shaft withflthe looper shaft to, effect oscillation thereof; a stop-motion; comprising; a belt Wheel operativelyrconnectedwith the upper shaft; a pumpudriving pulley; and a belt common to the belt wheel and pump driving pulley.-

6. A sewing-machine head provided with lengthwise chambered upper and under arms connected by a chambered trunk the chamber whereof communicates with the chambers of the arms; a top drive-shaft; a looper shaft; stitch-forming instrumentalit'ies; mechanism connecting the top driveshaft with the looper shaft to move the looper shaft endwise; mechanism connecting the top drive-shaft with the looper shaft to effect oscillation of the latter; a stopmotion mechanism operatively connected with the drive-shaft; the said looper-shaft actuating mechanisms and stop-motion being contained in the chamber of the trunk and housed thereby; an oil-containing reservoir; an oil pump supported by the reservoir; the reservoir being supported forwardly of the rear wall of the trunk; and

an eduction tube from the pump being 10- cated'within the chamber of the pump; the trunk chamber containing an oil container into which the eduction tube discharges; and the stop motion having exposed in said oil chamber. an oil-receiving space whereby the stop motion receives oil from said chamber.

7 A. sewing-machine head having lengthwise chambered upper and under arms and a chambered trunk, the chamber whereof communicates with the chambers of said arms; a drive shaft mounted in one of said arms; a looper shaft mounted in the other of said arms stitch-forming instrumentalities; the said shafts being tubular; an oil reservoir having a drip pan at the bottom of the trunk chamber; an oil pump mounted .in said reservoir; the trunk chamber containing an oil container, an eduction pipe fromthe pump in the reservoir and discharging into said oil container; and the rear end of the top-shaft chamber being exposed in said' oil-containing chamber.

8. A sewing-machine head having lengthwise chambered upper and under arms and a chambered trunk, the chamber whereof communicates with the chambers of said arms; a drive shaft mounted in one of said arms; a looper shaft mounted in the other of said arms; stitch-forming instrumentalities; the said shafts being tubular; an oil reservoir having a drip pan at the bottom of the trunk chamber and an oil pump mounted in said reservoir; the trunk chamber containing an oil container, an eduction pipe from the pump in the reservoir and discharging into said oil container; and'the rear end of the top-shaft chamber being exposed in said oil-containing chamber; a driving pulley for the top shaft and a belt therefor; the drip pan having a walled hole through it for passage of the belt.

p 9. In a sewing-machine, the combination of an oil reservoir; an oil pump; a driveshaft having a lengthwise bore constructed and arranged to receive oil from the pump; a needle crank fixed on the front end of the drive shaft, the bore whereof is connected by an oil conduit with the crank shaft; a needle-actuating link; a needle carrier; and

a guide for the needle carrier, the guide be-- ing provided with an oil conduit to receive oil flying off the needle link.

10. The combination of an implement-carrying head having a drive-shaft; stop-motion members inc-losing such shaft and formed with a lubricant-receiving port; and a lubricant reservoir fixed to said head and containing a lubricant pump having an eduction conduit for discharge of lubricant to said port.

11. The combination with upper and uuder conduit-forming shafts having lubri cant intake and exit ports, of means operatively connecting said shafts for operating them in unison; a stop-motion operatively combined with one ofthe shafts; means for actuating the stop motion; a lubricant pump; and conduit connections for delivering lubricant to said shafts and. stop my hand this 3d day of April, 1916.

' JOHN PETER IVEIS. 

